I have rode the older street and the speed, just couldn't get on with either bikes. I also rode the ST Sprint which again just couldn't get on with it. The brakes were shocking!!
In the last day or so I have test ridden both the new Street Triple RS and the 2017 MT-09.
Triumph - the suspension was good as you would expect but the brakes were a little lacking unless you had a bit of heat in them first.
It's a revvy engine with top gear only pulling about 12mph per 1000rpm while my MT is about 15/1000 I think.
Even though top is only equal to 4th/5th on the MT it still doesn't pull as well although this may be down in part to the extra 90cc on the MT and/or the fact that the RS model has it's torque higher up the rev range than the R model but I know which I prefer. It's also missing a bit of initial grunt off the line.
Despite the fact that that the Triumph has a semi cafe racer stance (no good for my back) and the MT is bolt upright I felt it easier to hold on to the Yam and imagine that if you were making progress (say 110mph/120mph plus) that you may feel it hard to hold on to and/or that the seat feels a little slippery at speed and hard to grip.
Yamaha - the new front end is much better than my15 model and felt a little lower. However this showed that the rear is still lacking somewhere.
The engine is mostly the same but seems to be missing a little initial grunt but maybe the ecu flash that Simon at S-Tec has done on mine and/or the DNA airfilter has helped.
The quick shifter on both is, for me, a bit of a gimmick and not something that I'd generally use.
ABS - well I've not locked up a wheel for years but I guess it may be handy and didn't seem to effect overall brake performance.
Traction Control - again, maybe handy but haven't had a wheel spin up on me either for years.
If I am going to spend any money it will be on improving my existing bike and treating it and myself to some new suspension some time.